This MicroLogic 7.3 E (Energy) 4-pole 4d electronic trip unit is an electronic trip unit used on ComPacT NSX 400/630 circuit breakers. This electronic trip unit with a rated capacity of 400 A is the best choice for all standard and special applications. It has customizable long-term protection against overloads. It also offers customizable short-time delayed short-circuit protection and instantaneous short-circuit protection. The Vigi MicroLogic 7.3 E trip unit offers integrated, adjustable residual current protection. MicroLogic 7.3 E indicates overloads with alarm LEDs. The green Ready LED flashes when the circuit breaker is ready to trip. MicroLogic 7.3 E is equipped with a display module that provides energy measurements and allows fine adjustment. A residual current pre-alarm can be available remotely by installing the optional SDx module (LV429532). This product is part of our EcoStruxure Power architecture when combined with the PowerTag NSX and ComPacT NSX basic switch.